Jiajie Shen¹, Yan Wang^1,*, Dongxu Zhang²

CMC-Computers, Materials & Continua, Vol.79, No.3, pp. 4349-4370, 2024, DOI:10.32604/cmc.2024.047903 - 20 June 2024

Abstract Locomotor intent classification has become a research hotspot due to its importance to the development of assistive robotics and wearable devices. Previous work have achieved impressive performance in classifying steady locomotion states. However, it remains challenging for these methods to attain high accuracy when facing transitions between steady locomotion states. Due to the similarities between the information of the transitions and their adjacent steady states. Furthermore, most of these methods rely solely on data and overlook the objective laws between physical activities, resulting in lower accuracy, particularly when encountering complex locomotion modes such as transitions.… More >

Noor K. Faheed^*, Qahtan A. Hamad, Jawad K. Oleiwi

Journal of Renewable Materials, Vol.10, No.7, pp. 1989-2013, 2022, DOI:10.32604/jrm.2022.017573 - 07 March 2022

Abstract Natural fibers and their composites are the evolving movements in material science, and with that, the utmost use of plant-based fibers has become the focus of this research. Sisal and cotton natural fibers were used to construct a prosthetic socket as an attempt to substitute material currently available in the manufacturing of sockets. The vacuum bagging technique was adopted to produce a below-knee socket. The influence of different fiber layering sequences on the volumetric and mechanical characteristics was estimated experimentally and numerically. Mechanical tensile tests were used to assess laminated specimens, such as tensile strength,… More >

Ali Murtaza¹, Muhammad Usman Qadir¹, Muhammad Awais Khan¹, Izhar ul Haq^1,*, Kamran Shah¹, Nizar Akhtar²

Intelligent Automation & Soft Computing, Vol.31, No.3, pp. 1887-1899, 2022, DOI:10.32604/iasc.2022.020006 - 09 October 2021

Abstract Transfemoral prostheses have evolved from mechanical devices to microprocessor-based, electronically controlled knee joints, allowing amputees to regain control of their limbs. For improved amputee experience at varying ambulation rates, these devices provide controlled damping throughout the swing and stance phases of the gait cycle. Commercially available microprocessor-based prosthetic knee (MPK) joints use linear controllers, heuristic-based methods, and finite state machine based algorithms to track the refence gait cycle. However, since the amputee experiences a variety of non-linearities during ambulation, such as uneven terrains, walking backwards and climbing stairs, therefore, traditional controllers produces error, abnormal movements,… More >

Caili Li¹, Dalin Tang^2,*,3, Jing Yao^4,*, Christopher Baird⁵, Haoliang Sun⁶, Chanjuan Gong⁷, Luyao Ma⁶, Yanjuan Zhang⁴, Liang Wang², Han Yu², Chun Yang⁸, Yongfeng Shao⁶

CMES-Computer Modeling in Engineering & Sciences, Vol.127, No.1, pp. 159-174, 2021, DOI:10.32604/cmes.2021.014580 - 30 March 2021

Abstract Aortic valve replacement (AVR) remains a major treatment option for patients with severe aortic valve disease. Clinical outcome of AVR is strongly dependent on implanted prosthetic valve size. Fluid-structure interaction (FSI) aortic root models were constructed to investigate the effect of valve size on hemodynamics of the implanted bioprosthetic valve and optimize the outcome of AVR surgery. FSI models with 4 sizes of bioprosthetic valves (19 (No. 19), 21 (No. 21), 23 (No. 23) and 25 mm (No. 25)) were constructed. Left ventricle outflow track flow data from one patient was collected and used as… More >

James A. Kuo¹, Tyler Hamby², Maham N. Munawar³, Eldad Erez⁴, Vincent K. H. Tam⁵

Congenital Heart Disease, Vol.14, No.4, pp. 651-656, 2019, DOI:10.1111/chd.12765

Abstract Objective: Various options exist for right ventricular outflow tract (RVOT) recon‐ struction in congenital heart disease. The Freestyle porcine aortic root may be used but its longevity is not well defined.
Design: We performed a retrospective review of all non‐Ross RVOT reconstructions using the Freestyle root in our institution. Survival and reintervention, either by sur‐ gery, transcatheter valve implantation, balloon valvuloplasty, or bare metal stent placement, were recorded. Factors associated with reintervention were assessed using Cox regression.
Results: Between January 2002 and December 2015, there were 182 patients identi‐ fied. Sixteen patients were lost to follow‐up and 3… More >

Brian Robichaud¹, Garick Hill², Scott Cohen^1,3, Ronald Woods⁴, Michael Earing^1,3, Peter Frommelt¹, Salil Ginde^1,3

Congenital Heart Disease, Vol.13, No.5, pp. 734-739, 2018, DOI:10.1111/chd.12639

Abstract Background: Pulmonary valve replacement (PVR) is a common operation in patients with congenital heart disease (CHD). As survival with CHD improves, infective endo‐ carditis (IE) is a growing complication after PVR. The aim of this study was to assess the incidence, risk factors, and clinical outcomes of IE after surgical PVR in patients with CHD at our institution.
Methods: Retrospective analysis of all cases of surgical PVR performed at Children’s Hospital of Wisconsin between 1975 and 2016 was performed. All cases of IE after PVR were identified and clinical and imaging data were obtained by review of… More >

Eun Young Choi¹, Jinyoung Song², Heirim Lee², Chang Ha Lee³, Jun Huh², I.-Seok Kang², Ji Hyuk Yang⁴, Tae Gook Jun⁴

Congenital Heart Disease, Vol.12, No.6, pp. 746-750, 2017, DOI:10.1111/chd.12507

Abstract Background: Balloon dilatation of a bioprosthetic valve in the pulmonary position could be performed to delay valve replacement. We proposed to identify the long-term effectiveness of such a procedure.
Methods: We reviewed the medical records of 49 patients who underwent balloon valvuloplasty between January 2000 and December 2015. The primary goal was to determine the time interval until the following surgical or catheter intervention.
Results: The mean age at bioprosthetic valve insertion was 5.7 years old, and the mean age for ballooning was 11.7 years. The mean interval after pulmonary valve replacement was 71.6 months. The mean ratio… More >

Tushar Kulkarni^1,2, Rashmi Uddanwadiker¹

Molecular & Cellular Biomechanics, Vol.12, No.3, pp. 147-195, 2015, DOI:10.3970/mcb.2015.012.147

Abstract Continuous growth in industrialization and lack of awareness in safety parameters the cases of amputations are growing. The search of safer, simpler and automated prosthetic arms for managing upper limbs is expected. Continuous efforts have been made to design and develop prosthetic arms ranging from simple harness actuated to automated mechanisms with various control options. However due the cost constraints, the automated prosthetic arms are still out of the reach of needy people. Recent data have shown that there is a wide scope to develop a low cost and light weight upper limb prosthesis. This… More >